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4,4'-Azobis(4-cyanovaleric acid), 98%, cont. ca 18% water, Thermo Scientific Chemicals
Description
4,4'-Azobis(4-cyanovaleric acid) is used as a free radical imitator in polymer synthesis such as polyvinyl chloride, polyacrylonitrile, polyvinyl alcohol and synthetic fibers. It is utilized for both heterogeneous and homogenous free-radical polymerizations, and as an initiator in reversible addition-fragmentation chain transfer polymerization (RAFT). It is also used as a blowing agent for plastics and elastomers.
This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.
4,4′-Azobis(4-cyanovaleric acid) is used as a free radical imitator in polymer synthesis such as polyvinyl chloride, polyacrylonitrile, polyvinyl alcohol and synthetic fibers. It is utilized for both heterogeneous and homogenous free-radical polymerizations, and as an initiator in reversible addition-fragmentation chain transfer polymerization (RAFT). It is also used as a blowing agent for plastics and elastomers.
Solubility
Soluble in water.
Notes
Light senstive. Incompatible with strong oxidizing agents.

Specifications
Specifications
Melting Point | 118°C to 125°C (decomposition) |
Linear Formula | HOCOCH2CH2C(CH3)(CN)N=NC(CH3)(CN)CH2CH2COOH |
UN Number | UN1325 |
Beilstein | 1729856 |
Solubility Information | Soluble in water. |
Quantity | 25 g |
Formula Weight | 280.28 |
Sensitivity | Light sensitive |
Percent Purity | 98% |
Assay | contains ≈18% water |
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Certificates
Certificates
A lot number is required to show results for certificates. To find your lot number on previous orders use our order status area.
Lot Number | Certificate Type | Date | Catalog Number |
---|---|---|---|
N13L025 | Certificate of Analysis | 17/02/2025 | H59611.14,H59611.22 |
S08H044 | Certificate of Analysis | 23/11/2021 | H59611.14,H59611.22 |
U28G042 | Certificate of Analysis | 23/11/2021 | H59611.14,H59611.22 |
T07H006 | Certificate of Analysis | 23/11/2021 | H59611.14,H59611.22 |
Q14B027 | Certificate of Analysis | 23/11/2021 | H59611.14,H59611.22 |
Safety and Handling

- 4,4'-Azobis(4-cyanovaleric acid), cont. ca 18% water
- Danger
- Self-reaC & Dtive substanC & De or mixture Type C & D
- H242-Heating may cause a fire.
- P210-Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- P234-Keep only in original container.
- P280-Wear protective gloves/protective clothing/eye protection/face protection.
- P403+P235-Store in a well-ventilated place. Keep cool.
- MIXTURE LIST-Contains : 4,4'-azobis[4-cyano-pentanoic acid
RUO – Research Use Only
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